The U.S. Coast Guard on Monday said it was still looking for the source of a leak from an underwater pipeline off the Louisiana coast in the Gulf of Mexico that it estimated had released more than a million gallons of crude oil.
While the exact volume of discharged oil was not known, the Coast Guard, which was leading the clean-up, said initial engineering calculations placed the volume of the leak at 1.1 million gallons, or 26,190 barrels.
https://en.m.wikipedia.org/wiki/List_of_oil_spills